Ventilating apparatus



Aug. 15, 1967 H. R. KILLAM VENTILATING APPARATUS Filed Feb. 28, 1966 United States Patent 3,335,654 VENTILATING APPARATUS Harry R. Killam, Livonia, Micl1., assignor to American Radiator & Standard Sanitary Corporation, New York, N.Y., a corporation of Delaware Filed Feb. 28, 1966, Ser. No. 530,520 4 Claims. (Cl. 98-43) This invention relates to ventilating apparatus and, more particularly, to improved ventilating apparatus particularly adapted for installation in a wall of a building, through which it is desired to exhaust air or other gases from the building.

An object of the invention is to overcome disadvan tages in prior ventilating apparatus of the indicated character, and to provide an improved ventilator incorporating improved means for exhausting gases away from the building wall so that the exhaust .gases will not form dust or grease streaks on the building wall.

Another object of the invention is to provide improved ventilating apparatus incorporating improved means for increasing the volumetric capacity of the apparatus.

Another object of the invention is to provide improved ventilating apparatus that is economical to manufacture, durable, efiicient, and reliable in operation.

Another object of the invention is to provide improved ventilating apparatus that may be installed in a building wall with a minimum of labor and expense.

Another object of the invention is to provide improved ventilating apparatus incorporating means which provides maximum back-draft protection and at the same time provides a large volume outlet with minimum air resistance.

Another object of the invention is to provide improved ventilating apparatus incorporating improved means for reducing air resistance through the apparatus.

Another object of the invention is to provide improved ventilating apparatus which eliminates the necessity of providing a conventional scroll sheet.

Still another object of the invention is to provide im* proved ventilating apparatus which eliminates rain tight ness problems inherent in prior apparatus of the indicated character.

The above as well as other objects and advantages of the present invention will become apparent from the following description, the appended claims and the accom panying drawing wherein:

FIGURE 1 is a rear elevational view of ventilating apparatus embodying the present invention, showing the same installed in a building wall, and

FIGURE 2 is a sectional side elevational view of the apparatus illustrated in FIGURE 1, taken on the line 2--2 thereof.

Referring to the drawing a wall type ventilator generally designated embodying the present invention is illustrated therein and is comprised of a generally rectangular housing, generally designated 12, which includes a flat top wall 14 and horizontally spaced, flat side walls 16 and 18, the top wall 14 and the side walls 16 and 18 each being provided with flanges 20 for attachment of the housing 12 to the outer surface of the building wall 22 through which it is desired to exhaust stale or contaminated air which may contain grease fumes and other foreign matter. The disposition of the housing 12 outside the building lessens on-the-job labor and expense during installation of the ventilator.

A vertical partition 24 is provided within the housing 12, the partition being provided with flanges 26 which are welded or otherwise secured to the top and side walls of the housing. In order to stiifen the partition 24, vertically spaced, horizontally extending emboss-ments 27 and 28 are provided in the partition.

3,335,654 Patented Aug. 15, 1967.

ice

An electric motor 30 is mounted on the partition member 24, the motor 30 having a drive shaft 32 which is secured to the hub 34 of a conventional centrifugal blower wheel 36. The axis of revolution of the drive shaft 32 and of the centrifugal blower wheel 36 is ofifset downwardly and to the right of the housing axis 38 when the blower wheel rotates in the direction indicated by the arrow 40 so that the points 42, 44, and 46 on the housing are at different distances from the perimeter of the wheel 36. It has been found that such a construction functions somewhat in the manner of a scroll sheet, elimi nates the necessity of providing a scroll sheet in the ventilating apparatus, and increases the volumetric capacity of the apparatus.

Air which is to be exhausted from the building is introduced to the blower wheel 36 through an inlet member 48 which is mounted on the flat front wall 50 of the housing, the inlet member 48 being adjustably secured by nuts 52 threadably engaging studs 54. The blower wheel 36 exhausts the air to a chamber 56 and then downwardly through an outlet 58 which extends entirely across the housing and is defined by a rear tie bar 60 and the corner between an inclined wall 62 and a horizontal portion 64 of the front plate 50. The disposition of the motor 30 in a chamber 65 separate from the blower chamber 56 shields the motor from dirt and grease in the air stream and at the same time the disposition of the motor out of the air stream reduces air resistance and contributes to higher volumetric capacity of the apparatus.

When the blower wheel 36 is motionless, the outlet 58 is closed by a flat, swingable damper vane 68 which is hingedly connected to the partition 24 by hinges 70 and 72, the damper vane 68 preventing outside drafts from traveling back through the wheel 36 into the building, and being provided with suitable weather stripping 69. The flat swingable damper vane extends entirely across the rectangular opening 58 to provide back draft protection and at the same time a large volume outlet is provided for minimal air resistance.

The rear opening of the ventilator housing is closed by a removable cflat access panel 78 having a rain tight joint with the housing, a bird screen 79 being provided below the motor 30.

The motor is energized by electrical wiring 80 extending through a pipe 82 which extends through the front wall 50 and is secured to the partition 24 by a grommet 84, the motor rotating the blower wheel 36 and exhausting the air through the outlet 58. When the motor is energized the damper vane 68 is forced open by the air pressure created by the blower and swings about the axes of the hinges 70 and 72 from the closed position illustrated in full lines to the open position illustrated in dotted lines, and the exhaust air is directed downwardly away from the outer face of the building wall by the inclined Wall portion 62 so that the exhaust gases will not form dust or grease streaks on the building wall.

While a preferred embodiment of the invention has been shown and described it will be understood that various changes and modifications may be made without departing from the spirit of the invention.

What is claimed is:

1. A ventilator comprising, in combination, a housing having a flat top wall and a pair of spaced flat side walls, a vertical partition dividing said housing into first and second chambers each having a longitudinal axis, an electric motor disposed in said first chamber and supported by said partition, said motor having a drive shaft extending through said partition, a centrifugal blower disposed in said second chamber and drivably connected to said shaft, the axis of rotation of said blower being oifset with respect to the longitudinal axis of said second chamber, said housing having a front wall defining an inlet communicating with said centrifugal blower, said housing also having a bottom wall defining an outlet communicating with said second chamber and extending angularly downwardly and outwardly therefrom.

2. The combination as set forth in claim 1, and closure means for said outlet hingedly connected to said partition and operable to swing from a closed position to an open position upon actuation of said centrifugal blower.

3. The combination as set forth in claim 2 wherein said top and side walls are each provided with laterally extending flanges adapted to be attached to a wall of a building.

4. A ventilator comprising, in combination, a housing having atop wall and a pair of spaced side walls, a vertical partition dividing said housing into first and second chambers, an electric motor disposed in said first chamber, said motor having a drive shaft extending through said partition, blower means disposed in said second chamber and drivably connected to said shaft, said housing defining an inlet communicating with said second chamber, said housing having a bottom wall defining an outlet in said first chamber, said partition having an opening providing communication between said first and second chambers, a closure member hingedly connected to said partition to normally close said opening, said closure member being operable to swing from its normally closed position to an open position upon actuation of said blower.

References Cited UNITED STATES PATENTS 1,825,036 9/1931 Young. 1,905,599 4/ 1933 Nowitsky 230-1 17 2,334,789 11/1943 Olson 230-117 X 3,120,798 2/1964 Nash 98-43 ROBERT A. OLEARY, Primary Examiner.

W. E. WAYNER, Assistant Examiner. 

1. A VENTILATOR COMPRISING, IN COMBINATION, A HOUSING HAVING A FLAT TOP WALL AND A PAIR OF SPACED FLAT SIDE WALLS, A VERTICAL PARTITION DIVIDING SAID HOUSING INTO FIRST AND SECOND CHAMBERS EACH HAVING A LONGITUDINAL AXIS, AN ELECTRIC MOTOR DISPOSED IN SAID FIRST CHAMBER AND SUPPORTED BY SAID PARTITION, SAID MOTOR HAVING A DRIVE SHAFT EXTENDING THROUGH SAID PARTITION, A CENTRIFUGAL BLOWER DISPOSED IN SAID SECOND CHAMBER AND DRIVABLY CONNECTED TO SAID SHAFT, THE AXIS OF ROTATION OF SAID BLOWER BEING OFFSET WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID SECOND CHAMBER, SAID HOUSING HAVING A FRONT WALL DEFINING AN INLET COMMUNICATING WITH SAID CENTRIFUGAL BLOWER, SAID HOUSING ALSO HAVING A BOTTOM WALL DEFINING AN OUTLET COMMUNICATING WITH SAID SECOND CHAMBER AND EXTENDING ANGULARLY DOWNWARDLY AND OUTWARDLY THEREFROM. 